In an inboard configuration, the glass is positioned towards the interior, room-side of the frame or mullion. Viewed from the exterior, the framing is prioritized to produce a layered, dimensional look that shadows the recessed, inset glass or panel. This placement also can provide added protection from exterior elements, which can enhance durability and reduce exposure to weather. It may be specified to support improved thermal performance by allowing space for external insulation.

In an outboard configuration, the glass or infill panel is positioned closer to the exterior face of the frame. This arrangement emphasizes the glass and minimizes the visible frame, creating a sleek, modern aesthetic, often used in contemporary designs. It also mimics the look of curtainwall which delivers a consistent appearance for buildings that feature both curtainwall and storefront systems. Given the infill surface’s exposure, additional considerations may be necessary for areas with high traffic and challenging climates.

In a center-set configuration, the glass or panel insert is placed approximately in the middle of the frame or mullion. This position provides a balanced aesthetic with equal visibility of the glass and frame on both the exterior and interior. It offers a compromise between inboard and outboard systems, delivering a symmetrical look while maintaining weather resistance and thermal efficiency. This setup is commonly used when uniformity and balanced exposure are design priorities.

Using the same design, assembly and accessories, Tubelite 14000 Series Multiple Plane Storefront allows you to combine inboard, outboard and center planes of glass in the same elevation with the same, high performance. This true multiplane flexibility is a highlight of the enhanced Tubelite 14000 Series Storefront. Typical glass thickness is 1-inch, and special glazing pocket reducers also can accommodate the use of ¼-inch infill thicknesses. In addition, our storefront system gives glazing contractors the option to install these systems from either the outside or inside of the building.